B Opening and Closing
the System Unit



To install SBus cards, MBus modules, DSIMMs, or an internal disk drive; or to change the serial port jumper settings on the main logic board (see Appendix D), you must open the SPARCsystem 10 system unit.

This appendix tells you how to open and close the system unit.

Opening the System Unit

The top cover of the system unit attaches to the chassis at the front with molded plastic hooks and to the back panel with a plastic button and a captive screw. When you lift the cover upwards until it is at a 60-degree angle in relation to the chassis, you release the front of the cover from its points of attachment to the chassis.

To remove the cover from the system unit:

    1. Place the system unit on a work table.
    2. Remove the top cover from the system unit.
      a. Use a Phillips screwdriver to fully loosen the captive screw holding the cover to the back panel.

      The screw will remain attached to the back panel after it is fully loosened from the cover. See Figure B-1.

    Figure B-1 Captive Screw Location, Back Panel

      b. Use a Phillips screwdriver to press the plastic tab while you lift the cover from the back panel with your other hand.

      See Figures B-2 and B-3.

    Figure B-2 Plastic Tab Location, Back Panel

    Figure B-3 Lifting the System Unit Cover

      c. Face the back panel and grasp the sides of the cover and lift up until the cover is at a 60-degree angle in relation to the chassis. Push the cover forward until its hinge hooks are free of the chassis.

    Figure B-4 Removing the System Unit Cover, Side View

Warning -

Before powering up your system again, be sure to replace the cover using the procedure in the next section. It is not safe to operate the SPARCstation 10 without its top cover in place.

Closing the System Unit

To replace the system unit cover:

    1. Hold the cover at a 60 degree angle in relation to the system unit, and gently guide the hinge hooks on the cover into the tab slots on the front of the system unit. Continue to hold the cover with your hands.

    Figure B-5 Replacing the System Unit Cover, Side View

    2. Slowly lower the cover onto the system unit.
    3. Push down on the cover's left and right sides.

    See Figure B-6.

    Figure B-6 Pushing Down on the Cover's Sides, Back Panel View

    4. Guide the cover downwards so that the plastic tab snaps the cover to the back panel.

    See Figure B-6.

    5. Using a Phillips screwdriver, tighten the captive screw on the back panel to the cover.

    Figure B-7 Captive Screw Location, Back Panel

What's Next

You have finished Appendix B and have learned how to:

You need to open the system unit to reset the serial port jumpers and to:

All of the parts listed above come with installation instructions packed in the shipping boxes.